Biomedical subjects
Publications and source records attributed to S A Ahlgren.
Forty-two Wagner surface replacements were followed prospectively for 4 (3-6) years. Fifteen hips required rearthroplasty, in 11 cases owing to loosening and in 2 cases because of fracture of the femoral neck.
In a prospective study 50 extremities in 46 patients with total hip replacement (THR) were examined clinically and with EMG preoperatively and 4 weeks postoperatively. Four patients with normal preoperative findings had electromyographical evidence of nerve lesions postoperatively and three of these had clinical symptoms; one patient had no clinical symptoms. Ten patients with normal pre- and postoperative findings were re-examined 1 year after the operation and still found to be normal. In 150 records of patients with THR reviewed retrospectively, only one doubtful case of nerve lesions was found.
In four patients ectopic bone formed after total hip replacement was replaced with free fat transplants. One year later the patients were free from pain, and hip flexion had increased by 60 degrees on average. Ectopic bone was completely absent in one patient, and markedly reduced in the remaining three patients. Bone scintigraphy was found to be a sensitive technique to reveal early ectopic bone formation. Fat transplantation seems to be a satisfactory complement in the treatment of ectopic bone.
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An evaluation of the results of removal of a septic total hip prosthesis in 27 patients was made at least 1 year after the operation. The function of many of the patients improved throughout the first year after removal. It is concluded that the Girdlestone hip in many cases offers a satisfactory solution for the patient.
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Two hundred and one randomly selected patients (109 women and 92 men) fitted with their first lumbosacral corset because of low back pain were interviewed 3.5--4.5 years later. Two-thirds of the patients were 41--70 years when fitted with the corset. Barely three-quarters of them wore the corset regularly immediately after prescription. One-fifth became symptom-free within the period covered by the study. Of those who still had symptoms at the time of the interview, two-thirds (about half of the original material) were still wearing a corset. Of these two-thirds, about half wore the corset at least once a week. The women doing heavy work and female pensioners tended to use their corsets more frequently. The frequency with which the corsets were used was not influenced by the clinical diagnosis or the type of corset used. As many as 89 per cent of the patients reported that they used the corset because it supported their back or because it not only gave such support, but also relief from the pain. Thirty-seven of 96 non-users reported that the corset did not fit well but only 7 that they did not benefit from the use of the corset. A better follow-up of users would surely increase the frequency with which such corsets are used to the advantage of the patients.
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A case of incapacitating patella cubiti, probably of congenital origin, in a 45-year-old farm labourer is described. The fragment was extirpated, the pain disappeared and the patient returned to work.
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